Pentecost vs Shavuoth

Pentecost and Shavuoth both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pentecost	Yes	No	No	No
Shavuoth	Yes	No	No	No

As nouns, Pentecost and Shavuoth are synonyms defined as:

Pentecost and Shavuoth: (Judaism) Jewish holy day celebrated on the sixth of Sivan to celebrate Moses receiving the Ten Commandments

Other synonyms of Pentecost include Feast of Weeks, Shabuoth, Shavous, Shavuot.

Pentecost (noun)	Shavuoth (noun)
seventh Sunday after Easter; commemorates the emanation of the Holy Spirit to the Apostles; a quarter day in Scotland	(Judaism) Jewish holy day celebrated on the sixth of Sivan to celebrate Moses receiving the Ten Commandments
(Judaism) Jewish holy day celebrated on the sixth of Sivan to celebrate Moses receiving the Ten Commandments